|
Many people believe the sizes of our plumbing changed when the country went
from imperial to metric, but actually today's pipe and thread sizes are
still the same as pre-decimal days, only their description has changed.
Hopefully the following information may help clear up some of the confusion.
Copper Pipe is measured OD (outside diameter)
|
CURRENT
DESCRIPTION |
PREVIOUS
SIZE |
NOM. DIA.
(OUTSIDE) |
|
6mm
8mm
10mm
15mm
18mm
20mm
25mm
32mm
40mm
50mm |
1/4"
x 20G
5/16" x 20G
3/8" x 19G
1/2" x 19G
5/8" x 18G
3/4" x 17G
1" x 16G
1 1/4" x 16G
1 1/2" x 16G
2" x 16G |
6.4
7.9
9.5
12.7
15.9
19.1
25.4
31.8
38.1
50.8 |
|
